Valve.



Agg.' SCHLIEDER.

VALVE;

APPLICATIONFILEDA MAR..21, |913.

Patented Feb. 22, 1916.`

fr/ay.

iatlilii) STATES PATENT OFFIGE.

AUGUSTUS E. SCHLIEDER, OF DETROIT, MICHIGAN.

VALVE.

Application filed March 27, 1913.

To' all 'tl/fiom may concer/2,

Be i itnown that l, AtcbsrUs E. SCHLIEQ man, a citizen of the "Cnited States, and resident of Detroit, in the county of iVayne and State of Michigan, having invented certain new Improvements in Valves, of which the following is a specification.

My invention relates to improvements in valves, and has particular reference to valves used in engines employing explosive gases for the motive power, such for example as are employed on automobiles, motor boats, and the like. In valves of this character as now constructed, it is common practice te make the stem and the head of the valve entirely of steel, but as this is objectionable for the reason that the valve is too expensive and also for the reason that the steel produces a clatter or ringing sound, I employ a cast iron head and a steelstem which enables me to produce a valve of this chan acter at a much lower price and which will, to a great extent, dispense with the objectionable noise made by the heads of the steel valves as now used.

-Avalve constructed according to this invention will fulfil every requirement and be thoroughly eicient and practical from every point of view. p

'With these and other objects in view the invention, briefly stated, consists in a valve comprising a metal head having an orifice, a metallic stem fitting into said orifice, the end of said stem and the walls of said orifice being fused and uniting to form a homogeneous mass whereby said stem and head will be securely locked together, and it also consists in a valve comprising preferably a cast iron head formed with a central bore or orifice flared toward one end and a steel stem positioned in said bore and having one or morevannular'grooves or other depressions, the whole being so arranged'that the flaring of the bore provides a recess or pocket around said stem, so that in the process of merging the stem and head the molten metal employed enters said grooves or depressions and fills said pocket, and during this process the metals of the stem and head are united to form a homogeneous mass and provide a complete and uniform structure.

The invention further consists in the proc-l ess of merging a steel stem with a cast iron head in a novel manner to produce a valve as hereinafter described and claimed.

In order that the construction of the valve Imay be fully understoodI have illustrated Specification of Letters Patent.

Patented Feb. 22, '1916.

Serial No. 757,144.

in the accompan Ying drawings a series of views showing in detail the construction of the valve embodying my invention; this application being a continuation of my appli cation No. jlSA'/Q, filedv March 10, 1910, as to all subject matter which is common to the two.

In the drawings, Figure 1 represents a side elevation of a complete valve embodying my invention. vFig. 2 represents a sectional view of the valve head as it appears preparatory to applying to the valve stem. Fig. 3 is a side'elevation of the valve stem. Fig. 4 is a sectionaly elevation of the valve stem and the valve head applied thereon, the head being shrunk onto the stem. Fig. 5

represents a sectional elevation of the valve head and4 stem showing the first step in applying the heat for merging or Welding the head and the stem together and showing also the molten metal applied for this purpose. Fig. 6 represents a similar view show` ing the welding process almost completed and in which the metals of the head and stem and the molten metal used as a filler or merger are welded into a homogeneous body. Fig. 7 represents a Sectional view of the complete valve.

The reference numeral 10 designates the crown or head of thev valve provided with a central bore or orifice 11, which is cylindrical through a portion of its length, as at 12, thence flared to its upper end to form a recess or pocket 13, and 14 designates the valve stem which is preferably` of cylindri cal formation and preferably has near its upper extremity an annular groove 15, or any other depression which will serve the purpose of said groove, as will be clear from the following description. The valve stem 14 is of slightly larger diameter than the cylindrical portion 12 of said central bore or opening, and consequently the first step in the method of constructing this valve resides in the heating of the crown or head 10 at its central bore or orifice to expand the latter, after which the stem may be forced into the bore or orifice so as to make a shrink fit, the stem being forced into the bore or and While this intense heat is continued, l

insert in the flame a bar of suitable metal to melt the same and deposit the molten metal into the recess or pocket 13, or the molten metal may be otherwise provided for this purpose; this step vin the process being 1; clearly illustrated in Fig. 5. After applying the, molten metal into the recess or pocket, the molten metal, as Well as the walls of the pocket or cup andthe metal of that portion of the stern projecting into said pocket or cup are subjected to the action of the oXy-acetylene flame, or any other intense heat suitable for the purpose, and the entire recess or pocket may b e filled With metal so as to provide a flush upper face for the valve, .and this continued heat thus applied causes a complete merging 'of the'head and stem and produces a complete valve, as shown in Fig. 7, in which the head and'stem isa substantially homogeneous body.

It is .apparent from the foregoing that a valve produced in this manner possesses improved features and many -dvantages over valves now in general use and will completely obviate the objectionable noise and ringing sound occasioned by the contact of the steel head of the common valve against its valve-seat, and also that the cost Will be very materially,Y reduced.

Vhile it is to be understood that the headv need'not necessarily be of cast iron and the stem of steel, l now find this to be the most desirable combination owing to the fact that the stem of the valve is subjected to greater heat than the head thereof, and for this purpose I resort to the use of steel for the stem owing to the fact that iron will not satisfactorily withstand the heat and strain to which the stem is subjected.

Having thus described. my invention, what l claim is,-

l. valve comprising a metal head hav ing a central orifice therethrough, a steel stem fitting Within said orifice and having a depression, said orifice being' enlarged at one end to form a recess Whose base is in line with the lower Wall of said depression, and a welding substance merged with the metals of the head and stem and entering said depression. v

2. A valve comprising a head having ,a central orifice therethrough, a stem having an annular groove near its upper end and fitting within said orifice, said orifice being enlarged at one end, said stem projecting into the enlarged portion of said orifice, and a welding metal in said enlarged portion merged with the metals of said head and stem and entering said annular groove.

3. A valve comprising ametal head having a central orifice extending therethrough, a metallic stem fitting into said orifice and extending partiallythrough the-head, the

'end of said stem being fused and the orifice being filled With metal to unite with the 'fused end of the stem, substantially as described.

ft. A valve for internal combustion engines comprising ahead having a centrai orifice therethrough, a stem fitting Within said orifice and extending into the head, said orice being enlarged at one end and said stem projecting into 'the enlarged portion of said orifice, the

en d of said stem being fused Within said orlfice to partially fill the enlarged portion thereof, and the-remaining portion of the orifice being filled with metal which unites 'into said orifice, the end of said stem and the Walls of said orifice being fused together and uniting to form a4 homogeneous mass, and the shape of said recess causing the end of said stein when fused to assume a Wedge form, thereby locking it in said orifice, subf stantially as described.

6. A valve comprising a metal head having an orifice, a metallic stem fitting into said orifice, the end of said stem being fused and the orifice being filled with metal to' unite with the fused end of the` stem. p

7. A valve comprising a metallic head having an orifice provided with a recess. a metallic stem fitting said orifice, the end of said stem and the Walls of said orifice being fused in said recess and uniting to form a homogeneous mass, the shape of said Rf. H.. BROWN. 

